This was an used gyroscope that was updated to instead of have the expression jack to control the speed or tap ratios, it will provide a CV (control voltage) of the internal tap tempo LFO, an additional knob was added to control the amount range of the CV out, also a toggle switch to fine tune the amount in the early range and another toggle to change the sweep. Here’s a quick video of it in action, the signal is a vco (which the cv is synced to change its frequency) going into the gyroscope.